"I Got a Two-Track Playin' in my Head" -- Always

Let's play a game? I will run an ongoing feature when the mood strikes. I start the song, you tell me your age by finishing the lyrics, or not.  Here are some old frat-house favorites, from back in the day.

1) "Boom Boom Boom, Let's Go Back to my room, where we can: ....  and you can ...."

2) "When I'm walkin', I strut my stuff and I'm so strung out.  I'm ....  I just might ...."

3) "The Roof. The Roof. The Roof is on Fyr!" (.... )

Extra credit easy one:  

"Here she come now singin' 'Mony Mony' (... ...)!(... ...)!